When you post a duplicate it shows a list of the duplicates, but perhaps there need to be something more obvious

k00b

247bf84fda

notifying a use that their post is duplicate would be a simple start

i say this because i have posted at least one duplicate without realising!

SN release preview: Web of Trust ranking algorithm

notifying a use that their post is duplicate would be a simple start
should be easy for a URL post

i say this because i have posted at least one duplicate without realising!